Ensure AssociationCollection#count works with empty condition. [#271...

Ensure AssociationCollection#count works with empty condition. [#271 state:resolved] [Jan De Poorter]

activerecord/lib/active_record/associations/has_many_association.rb

@@ -9,7 +9,7 @@ def count(*args)
           @reflection.klass.count_by_sql(@finder_sql)
         else
           column_name, options = @reflection.klass.send(:construct_count_options_from_args, *args)          
-          options[:conditions] = options[:conditions].nil? ?
+          options[:conditions] = options[:conditions].blank? ?
             @finder_sql :
             @finder_sql + " AND (#{sanitize_sql(options[:conditions])})"
           options[:include] ||= @reflection.options[:include]

activerecord/test/cases/associations/has_many_associations_test.rb

@@ -32,6 +32,10 @@ def test_counting
     assert_equal 2, Firm.find(:first).plain_clients.count
   end
 
+  def test_counting_with_empty_hash_conditions
+    assert_equal 2, Firm.find(:first).plain_clients.count(:conditions => {})
+  end
+
   def test_counting_with_single_conditions
     assert_equal 2, Firm.find(:first).plain_clients.count(:conditions => '1=1')
   end